Dry-pipe valve



I May 7, 1929. E. E. CLARK DRY PIPE VALVE Filed April 19, 1924 (M ATTyS.

mKr T ahum VC. Imi um T 6 l E W lillli Y Patented May 7, 1929.

caire stares 1,711,772 PATENT FFCE.;

EZRA n. CLARK, or NEWTON-vinta, MAssAcHJsrrrrs; AssrGNon To FRANK J. ran, vor NEW Roer-mun, NEW YORK,

DRY-PIPE VALVE.

Applieatonled Aprill 19, 1924. Serial No. 707,743.

This invention relates to dry pipe valvesV and particularly to the pivotal connection between the airvalve and the easing. In some dry pipe valves, such for instance as :3 illustrated in my Patent No.' 1,450,428, April 3rd, 19237 the water valve and air valve are pivotally connected together and the water valve has an arm provided with a pivotal pin or shaft which is journalled in a4 slot i ted bearing formed on th@ casing, the Vslot of thebearing being for the purpose of permitting the pivotal shaft to be readily removed from the bearing whenever it is de-4 sired to remove the combined water and 'air valves through the opening or hand hole with which the casings of dry pipevalves are usually provided. This slotted bearing also provides for readily assembling the parts.

Inthese dry pipe valves it is highly'desirable that when the valves are` closed and are functioning in their usual way the pivotal axis of the water valve should reina-in stationary so that duringthe opening move# ment of the water valve it will turn about a fixed aXis. c Y

rhe open slot illustrated in my abovementioned patent, however, will permit the pivotal shaft of the water valve to have a lateral movement even when the valves are closed.

It is the object of my present invention to provide an improved form of bearing for the water valve which will prevent the pivotal shaft from having any lateral movement while they are swinging into open position and will only permit such lateral movement and removal of the valves when the valves are fully opened. With my invention, therefore, the pivotal axis of the valve will be positively held in its correct position.

while the valves are functioning but after the valves are fully opened then the pivotal shaft may be removed from the bearing if it is desired to remove the valves fromy the casing for repairs or any other reason.

In order to give an understanding ofthe invention I have illustrated in the drawings a selected embodiment thereof which will now be described after whichthe novel features will be pointed out in the'appended claims.

Fig. 1 is a sectional view through a dry pipe valve embodying my invention showing the valve` closed;

. Fig. 2 is a partial sectional view llustrating the valves in openrposition and in positic-n to be removed from the bearing.

In the drawings 1 indicates the casing of the dry pipe valve which has the usual inlet 2 terminating in the valve. seat 3 on which the water valve 4 is seated and also having thel outlet 5 leading to the system. The air valve is indicated at 6 and itseats on a valve seat 7 all as usual in dry pipe valves.

In the present construction the air valve and water valve are pivoted together as shown 8 and the water valve has an arm 9 vextending therefrom' which is pivotallyy connected to the casing. The casing is provided with an opening that A is normally cle-sed by a. removable closure 10, said closure being-situated opposite the air and water valves so that when it is removed access may be hadto said valves andthe latter may. be removed from the casing or rreplaced in the casing through said opening. l f

Thev parts t-hus far described are or may be all as usual in dry pipe valves of this type and form no part of my present invention which relates to the construction of the pivotal rconnection between the arm 9 of the water valve andthe casing. The casing is provided with a vbearing member 11 having a circular seat 14 in which is received a pivotal pin or shaft 12 that is rigid with the arm A9, the latter preferably being a forked arm which embraces the bearing the shaft may be removed. The end of the o slot adjacent the seat, however, isv narrower than the diameter of the pivotal shaft 12 so that when the shaft is in the seat as shown in Fig 1 it cannot be removed laterally through the slot 13.

YIn order to permit t-he removal of the pivotal shaft from the bearing when `the valve is open I propose to slabofi1 the shaft on one side as shown at 15 thereby reducing its thickness in one direction to that of the width of the slot 13 at its narrowest part. The slabbed off part 15 of the pin is so positioned that when the valve is closed as shown in Fig. l the slabbed off part stands on the inner face of the pin away from the slot 13 and opposite thereto while when the valve is opened as shown in Fig.y 2 this Cil slabbed off part stands on the upper side of the pin and parallel to the upper edge of the slot. When in this position the pivotal pin may be Withdrawn laterally from the bearing,` through the slot 13 bntvvhen the valve is Closed as shoivn in Fig. l the pivotal shaft is looked in the bearing and cannot be removed laterally therefrom. The slot 13 is preferably so disposed that the lower Wall 16 thereof has a tangential relation with the Circular wall ol the seat 14- Whiie the upper Wall 17 of the slot intersects the eirenlar seat lll at a point l elow the top thereof.

By means oi? my improvements the pivotal shaft 12 is positively retained in its proper position While the valves are closed and durinnr the opening,` movement thereof and can only be removed from this bearing when the valve are fully opened.

I Claim:

1. In a dry pipe valve, the combination With a easing havin@ a bearing member provided With a Cylindrical bearing portion and an open ended slot leading` to said bearingl portion, of a valve structure provided With a pivotal shaft jonrnalled in said bearing, said shaft being lattened on the `side which is opposite the slot when the valve is closed and the diametrical dimension of said shaft from the -flat aee to tne opposite aee being,` less than the Width of theslot at the bearing, whereby When the valve is opened the pivotal shaft may be removed from the bearing by a` lateral movement with respect to the axis or" the shaft.I

2. In a dry pipe valve, the combination with a easing having a bearing, of a Water valve having an arm provided With a shaft journalled in said bearing, and an air valve ernneeted to the Water valve, said bearing having an open slot leading thereto which is of less width than the diameter of the shaft, and the latter being` slabbed off on one side suilieiently to permit its being removed through said slot when the valves are fully opened.

3. In a dry pipe valve, the combination with a easing having a bearing provided with an open slotleading thereto, of a Water valve havingl an arm provided vvith'a shaft jonrnalled in said bearing, and an air valve connected to the Water valve, the diameter of the portion ofthe sha-ft occupying said bearing,` beintgV greater in one direction than the Width of the slot, and in another direction being of a dimension topass through the slot, said two diameters being relatively positioned with respect to the valves and the slot so as to permit said shaft tobe removed through the slot when the valves are fully opened.

In testimony whereof, I have signed my naine to this specification.

EZRA E. CLARK. 

